Oscurart Tools installation
Oscurart tools  are included in the  addons_contrib folder with blender distro 2.75, which going by your screenie, is the one you are using. 

I'm using 2.76.1 RC and have v3.2 not sure if that's the one with 2.75. 

Version 3.2 (and the whole addon_contrib) is here
https://git.blender.org/gitweb/gitweb.cgi/blender-addons-contrib.git/tree/HEAD:/oscurart_tools

Notice that you have to enable the "Testing" category to see them in the list.



They're in the toolbar of the 3Dview, press T in the 3D view, then click the Oscurart tools tab.



http://blenderartists.org/forum/showthread.php?294671-Oscurart-Tools-Update-(rig-model-render-setting-amp-more)